DEVCLASS_GET_DEVICE(9)

💅 DEVCLASS_GET_DEVICE 💅

okay bestie, welcome to the Kernel Developer's Manual corner of the internet, where we're talking about devclass_get_device — literally the glow-up translator between unit numbers and actual device instances. no cap. ✨

🌸 NAME 🌸

devclass_get_device — translate unit number to device

like, that's the whole job. number in, device out. iconic.

🎀 SYNOPSIS 🎀

#include <sys/param.h>
#include <sys/bus.h>

device_t
devclass_get_device(devclass_t dc, int unit);

yes bestie, both headers, don't skip one, that's the vibe check 🦋

✨ DESCRIPTION ✨

so this function retrieves the device instance that has the given unit number, and returns it. that's it. that's the function. she does one thing and she does it well. 👑

you hand her a devclass_t dc and an int unit, and she goes and finds the matching device instance for you. main character energy, honestly. 💅

💖 RETURN VALUES 💖

• if the device exists, it gets returned to you 🫶
• otherwise, you get NULL 😭

that's the whole deal. no in-between. no half-returns. just device or NULL.

👀 SEE ALSO 👀

• devclass(9)
• device(9)

go read those too, iykyk 📚

🦋 AUTHORS 🦋

This manual page was written by Doug Rabson. 🫡 absolute legend behavior.

Debian — June 16, 1998 — that's the version/date stamp on this one bestie, from the DEVCLASS_GET_DEVICE(9) page in the Kernel Developer's Manual. mwah, go forth and translate those unit numbers 💋🌈⭐